23000202121021 has 4 divisors (see below), whose sum is σ = 23018213243772. Its totient is φ = 22982190998272.

The previous prime is 23000202120991. The next prime is 23000202121067. The reversal of 23000202121021 is 12012120200032.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9240657624025 + 13759544496996 = 3039845^2 + 3709386^2 .

It is a cyclic number.

It is not a de Polignac number, because 23000202121021 - 2⁷ = 23000202120893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23000202120986 and 23000202121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23000202121081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9005559460 + ... + 9005562013.

It is an arithmetic number, because the mean of its divisors is an integer number (5754553310943).

Almost surely, 2^{23000202121021} is an apocalyptic number.

It is an amenable number.

23000202121021 is a deficient number, since it is larger than the sum of its proper divisors (18011122751).

23000202121021 is a wasteful number, since it uses less digits than its factorization.

23000202121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18011122750.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 23000202121021 its reverse (12012120200032), we get a palindrome (35012322321053).

The spelling of 23000202121021 in words is "twenty-three trillion, two hundred two million, one hundred twenty-one thousand, twenty-one".